Motor control.



H. T. HERR.

Moron cuwnmL.

APPLICATION FILED NOV. 25| 1910. RENEWED 061153.19124.

Patented May 30,1916.

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H. T. HERR.

loma coNTRoL.

APPLICATION FILED NOV. 25. |910- RENEWED OCT. 9| l9l3- Patented May 30, 1916.

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E N R O T T A H WITN H. T. HERR.

MOTOR CONTROL. APPLICATION man Nov. 25. |910. nENEwED ocr. 9. mls.

H. T. HERR.

MOTOR CONTROL.

AffPLlcAnoN FILED Nov. 25. |910. RENEwED ocT. 9. 1913.

Patented May 30, 1916.

4 SHEETS-SHEET 4.

NVENTOR /Zf :s //54 LNV //3 HIS ATTORNEY IN FACT.

WITN SES;

/2/ WJMM( HERBERT T. HERR, OF PITTSBURGH,

UNITED STATES PATENT OFFICE.

PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE WESTINGHOUSE MACHINE COMPANY, OF EAST PITTSBURGH, PENN- SYLVANIA, A CORPORATION OF PENNSYLVANIA.

MOTOR CONTROL.

To all `'av/1,0m t may concern Be it known that I. HERBERT T. HERR, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Motor Control, of which the following is a specification.

This invention relates to motor control.

One of the obiects of tlie invention is to provide means for controlling the direction of movement of the shaft driven by the impulse receiving element of the motor.

Another object of the invention is to provide means for controlling the speed at which the motoi operates either in a forward or reverse direction.

Another object of the invention is to provide means whereby the direction of the rotation of the power shaft of the motor may be controlled from a point remote from the motor.

A further object is to provide means whereby the speed of a motor may be. controlled from a point remote from the motor.

As an example of one application of my invention, it may be here stated that it is adapted for use in connection with rotary motors, such as turbines to be used on ship board. wherein the turbines are provided with an ahead stage and a reverse or astern stage.

Attention is called to the diiiculty usually experienced in maintaining a given speed in Heet or squadron formation in the navy. Vitli a device embodying the essential features of my invention, embodiments of which are illustrated in the accompanying drawin Jrs. any desired speed may be maintained v a ship in which an embodiment of in v invention is installed; and, moreover, the speed may be varied at the will of the operator from the bridge of the vessel; furtliei'more the speed may be instantaneouslychanged from the lowest to the highest speed (having regard for the period of time ordinarily required for accelei'ation) or the vessel can be quickly slowed'down. or any variation of speed between the highest and lowest can be readily accomplished hv increasing or decreasing the resistance offered to the centrifugal force of the weights for the speed responsive device ordinarily known as the lspeed governor. Likewise the direction of travel of the ship (that is ahead or Specification of Letters Patent.

Patented May 30, 1916. Renewed October 9, 1913.

Serial No. 794,326.

astern) may be controlled from the bridge by suitable inafter so master may hav speed and installed mechanism to be described herethat the navigator or quartere absolute control of the direction of movement of the ship with a device embodying the generic features forming a part of my invention. In the drawings: Figure 1 is an end view of a turbine showing a speed responsive device and one of the inlet valves the remaining in section,

portions being shown in elevation; Fig. 2 is a sectional view on the line 2-2 of Fig. 1; on the line 3-3 tional view on the line Fig. 3 is a sectional View of Fig. 1; Fig. 4 is a sec- -1-4 of Fig. 3; Fig.

a is a longitudinal sectional view through the controlling mechanism; Fig. 6 is a sectional view on the line 7 is ay sectional Fig. 5.

In carrying ou ploy a motor,

6-6 of Fig. 5; Fig.

View on the line 7-7 of t my invention I may emsuch for example', as a turbine 1() having two inlets,

the one designated 11' being the ahead stage inlet and the one designate inlet. The valve d 12 being the astern stage s for controlling the inlets are shown as controlled by suitable oil relays, there being an oil relay 13 for the valve controlling the inlet 11 and an oil relay 14 for the valve controlling the inlet two extremes by in Figs. 5, 6 and controls the operation of an oil eining valve hereinafter called a valve and designated mera] 17 of Fig.

for both the ahead of the turbine are a controller 16 illustrated 7.- The controller 16 also relay govreversing by the reference nu- 4. The valve mechanisms substantially alike, so

it is deemed necessary only to describe one of them.

By reference to Fig. 1 it will be observed that the inlet for a valve casing h outlet or outlet p be covered and each stage is provided with aving an inlet 18 and an orts 19. The ports 19 may uncovered by a rotating which fiuid may much of the val pass into the turbine. -So ve mechanism as has just and the asternj stages' been described is common to both inlets 1l and 12. `For the salte of clearness.y however, I have designated the valve stem. for the ahead stage as 2l and the valve stem for the astern stage as These stems may pass through suitable packed bushings or glands in their respective casings. The valve stem 21 is provided with an operating gear Q3, while the valve stein is provided with a similar gear J-l. ln suitable brackets :25 and :2G arr` rocking levers or segments. In the accompanying drawings, I have shown two of these,y one Jfor the gear 23 and the other for the gear El; the one vtor the gear 23 consists of a lever 2T pivoted intermediate its ends on the bracket 25 and having at one end a gear segment Q8, which meshes with the gear Q3. The other end of the lever is provided with a segment gear :29 which meshes with a rack formed or mounted on a piston rod of an oil relay to be described hereinafter. The other lever 30 is pivotcd on thc bracket ".l and is provided with ya gear segment 3l which meshes with the gear l--g the other end of the lever 3) is provided with a gear segment 32, which meshes with a rack formed or mounted on a piston rod in an oil relay to be described hereinafter.

l shall now proceed to describe the oil relay or actuating device 13 for the valve controlling the ahead inlet 11. By reference to Fig. 2 it will be observed that the relay or actuating device, which may be termed a valve actuating motor, may consist of a cylinder 33 provided with a reeiprocatory piston 3l; the piston Si is pro-- vided with a rod 35, which extends through one end of the cylinder and carries a rack 3G, which meshes with the toothed segment Q8 of the lever 27. An expansion spring 37 bears against one end of the cylinder and against one end of the piston so as to have a tendency to move the piston in a direction away from the end of the cylinder nearest the rack 3o. Means are provided for delivering fluid or liquid under pressure to the cylinder 33, so that the piston 34 is moved in response to the pressure of the liquid or fluid in opposition to the pressure of the spring 37. This moves the rack 3G, which engages the gear Q3 on the stem of the valve 20, serving the inlet 1l to the ahead stage of the turbine. and rotates the valve to increase its port opening and the delivery of motive fluid to the ahead stage of the turbine.

It might be stated to advantage here that the relay for the ahead stage valve mechanisrn is independent of the relay for the astern stage valve mechanism. although both relays are constructed and operate in suh- Stantially the same manner. ln order to distinguish like mechanism in the astern stage valve operating relay from those of the numeral applied to meshes ahead stage valve operating relay, l have used the saine reference numerals on the relay 14: as are employed to designate correspending parts on the relay 13, hat I have added the exponent a" to each reference the relay 14; i'or example. the part on the relay ll corresponding to the part 33 on the relay 13 will he designated :B3n: the part corresponding to the part 3i of the relay 13 will be designated on the relay 1l. Il l and so on.

Communicating with passages 35 and 38 ot the respective relay cylinders is the casing of the reversing valve 1T, see Fig. al. The easing for the reversing valve i7 is provided with a plurality oik ports communicating with the cylindersI of the relays 12v and ll with valve casings for l'sontrolling valves and the exhaust ports.

In Fig. l l have shown a valve in the casing as being in position to admit oil or tluid into the ahead cylinder 33 of the relay` and in Fig. l have shown the admission valve in proper position to admit oilr into the cylinder of the relay i3. Iill is a bushing within the reversing valve casings 1T. This bushing is shown provided with ports 40, al, l2, l?) and lllithin the bushing 3l) is a valve stem 45 carrying piston valves 4G and il] interposed between which a partition or collar 48. It the piston 3l to lie moved against the spring 3T, fluid under pressure will be admitted into the port 40 around the stem 45 ont through the port ll into the passage 3S and against one end of the piston 34; this will he possible by having the valves on the valve stem if in the positions shown in Fig. 4 so that the inlet port lvl will be closed by the valve 4T, the inlet port 4() will he uncovered by the valve Alll and the cylinder 33 will be placed in communication with the exhaust port 42. The position of the valve stem 45 and its valves, as shown in Fig. 4, is. the normal position due to the force exerted by a spring 49, one end of which bears against a cap or housing 50 and the other end of which bears against one end of the stem 45. It it is desired to cut off communication between the port 40 and the inlet passage 38 of the cylinder 33, this can be accomplished by causing pressure to preponderate at the end of the stem 45 distant from the. spring i9 so as to overcome the pressure exerted b v the spring to the extent that the valve 4G will move longitudinallyto close the port 40, displacing the valve 47 from its normal position to uncover the port 44 and cut oil the. supply of fluid from the cvlinder 33, but admit it to the astern cylinder 33% Vith the valve stem 45 in this position the collar 4S is shifted past the discharge port 42 and consequently places the cylinder 3? in commumication with the port 42 and Closes communication between that port and the cylinder 33. The means for admitting fluid pressure to act against the end of the stem 45 through a pipe 51 will be more fully explained hereinafter.

Communicating with the inlet port 40 is a cylinder 52 of a pilot valve; this cylinder is provided with ports 53, 54 and The port 53 communicates with a pipe 5G in communication with a suitable source of fluid, as for example, oil under pressure. The port 54 communicates with an exhaust pipe 57 and the port 55 communicates with the port 40. lithin the cylinder 52 is a reciprocatory valve stem 58, which carries a valve 59 adapted to cover and uncover the port 55. the stem being of less diameter than the diameter of the cylinder 52 and having at its respective ends heads 60 and 61. A similar construction of pilot valve and ports is provided for the astern relay as shown in Fig. 3, so I have designated parts on Fig. 3 corresponding to parts on Fig. 2 by the same reference numerals plus the eX- ponent a, as heretofore explained.

By reference to Fig. it will be observed that it oil is admitted through the pipe 56 into the cylinder 52 and the port 55 is uncovered by the valve 59, the oil will pass into the reversing valve 17; and in the event that pressure from the pipe 51 is not suHicient to overcome the force of the spring 49, the oil will pass through the port 4U through the port 41 so as to actuate the piston 34. If, however. pressure from the pipe 51 preponderates over the pressure exerted by the spring 49.. the valve 46 will close the port 40 and the valve 47 will be moved to open the port 44; therefore oil may pass from the pipe 56l into the cylinder 52 out through the port 55a through the port 44 through the port 83 into the passage 38a, and move the piston 34a against the action of the spring 37a and actuate the reverse or astern stage valve` while the ahead valve mechanism would be ineffective, to admit steam to the cylinder otl the turbine.

The pilot valves are controlled by a speed responsive device here illustrated as a governor 15 and through a pluralityr of links and levers, the positions of the pilot valves are such that a proper pressure will be admitted against the piston in order to operate the ahead or the astern valve operating relay, whereby the port area to the proper stage of the turbine will be such as to admit steam for the determined speed.

By reference to Fig. 1. it will be observed that a lay shaft 62 receiving motion from the motor shaft in the usual way naled in the bearing 63 in the governor casing 64. On the end of the shaft G2 is a gear 65 which meshes with a gear 66 on the restricted end 67 of the cylinder G8; the cylinder 68 carries a shaft 69 1n bear- 'A link 85 is connected and into the port 38l is j ourings 70 te which are secured links 71 and 72 for the governor weights 73 and 74. Links 75 and 76 are connected to the Weights 73 and 74 and to the spindle 77 carrying a piston 78 in the cylinder G8 and projecting through the hollow shaft 69. he governor spindle extends beyond the end of the casing and is connected to a lever 79 fulcrulned at 80 and carrying at its opposite end a link 81, which is connected to a bellcrank having one end fastened to links 88 and 83. The link 83 is connected to one end of a` floating lever 84, the other end of said lever being connected to the piston rod 35 of the piston 34.` The link 83 is connected to one end of a` floating lever 84, the opposite end of the lever being connected to the piston rod 35 of the piston 34". to the pilot valve stem 61 and to the lever 84. A similar link a is connected to the pilot valve lstem 61a and to the lever 84a.

lt will be apparent that if fluid pressure is admitted into the cylinder 68 through the pipe 86 and the restricted portion 67 of the cylinder, that the piston 78 will he raised so as to hold the governor weights 73 and 74 as eilfectually as could be accomplished by a spring and that this holding of the governor weights may be accomplished from a point distant from the motor, as for eX- ample, from the bridge of a ship. At the same time that the governor Weights 73 and 74 are loaded the longitudinal motion imparted to the spindle 77 will impart movement to the link 81 and through the links 83 and 88- to the pilot valves so as to cause them to open their inlet ports and admit fluid into the valve casing 17. It is to be remembered now that where no pressure is exerted to counter-balance the action of the spring 49 that the valves will be in the position shown in Fig. 4 and fluid will he admitted into the ahead cylinder 13 of the valve actuating mechanism. As this Huid is admitted. obviously the piston 34 will move against the action of the sprin 37 and open the inlet valve for the ahead stage of the turbine an amount determined by the position of the piston 34; and the p0- sition of the piston 34 in the cylinder 33 is determined by the length of time the inlet port 55 is opened.

It should be here stated that When pressure is admitted against the governor piston 78. a` downward pull will be exerted on the pilot valves so as to uncover the inlet ports and 55a; but as soon as pressure is admitted into the cylinder 33, the movement of the piston will impart a movement to the lever 84 carrying with it the pilot valve stem G1 to close the port 55, as shown in Fig. The duration of time that the port is open will therefore be determined by the amount of pressure exerted against the piston TS, because the extent ot move ment of the piston 7S due to a determined pressure will determine the amplitude of movement of the link H1 and consequently the amplitude of movement of the pilot valve. For example it the pilot valve is barely moved ott' its` seat, a slight movement ot' the piston 3i will cause it to he reseated: hut if maximum pressure is exerted against the piston T8, the movement of the pilot valve will he proportionally great and a pro portionately greater movement ot the piston 31 must take place to re-seat the valve 50. It will be apparent that if the motor is in a state of rest hy simply applying pres sure against the piston in. the inlet valve to the turbine will he open through the relay and the motor will he started up. It the speed of the motor hecomes excessive` a movement will he imparted to the piston T8 by the centrifugal action ot the weights TS and T4 against the pressure in the cylinder 0S and a movement will he imparted to the link 81 in a direction opposite to that just described. In this event. the pilot valve will he unseated not to admit pressure against the piston 34, hut to relieve it. that is to permit the pressure to exhaust through the pipe 57 causing the pressure oi' the spring 37 to preponderate to the extent that the piston 3l will be moved against the fluid pressure` and the inlet valve to the turbine stage will he closed, or partially closed. de pending of course upon the movement of the piston 34.

In Fig. 3. I have illustrated the relative positions of the linl\'s piiot valves and their appurtenances that they would assume if the turbine was in operation with the astern inlet valve closed and the ahead inlet valve open. In such a case both the links S3 and 83 will have the same length of stroke imparted to them hy the governor Spindle 77; but the relative positions of the pilot valves Will he different with respect to their respective ports; while the movement of the astern operating valve relay will he such as to admit pressure to its cylinder. the port 44 from the astern pilot valve is closed hy the valve 47.

I have heretofore referred to certain fluid controlling means for imparting movement to the piston 7S and for movingr the valve stern 45 against the action of the spring it), One. forni ot the controlling mechanism is liest illustrated in Figs. 5. (l and T. I will now proceed to describe it in detail and the manner in which it associated with the, remaining parts of the device.

The form of controller herein shown con sists of a chamber 8T provided with an in let 87 and an outlet ST" communicating with a pipe 86 which admits air into the c vlin der 68 of the speed responsive device. t one end ot the cylinder'ST is a piston guide S8 to receive a longitudinal movable. piston 8) normally extended in one direction by means of a spring 90, one end of which hears against a spring seat at the end J1 of the cylinder Si and the other end oi which bears against a` disk 02 on the end of the piston rod 053, which may extend through the end 01 ot the cylinder 87 to he guided thereby; the disk it.) having a lug or projection 94 to provide a point contact with the inner face ot' the piston S9. By reference to Fig. 5 it will he observed that in the form shown, the inlet STa is annular, that is it is provided hy the inner wall of the` cylinder 87 and the exterior of the piston 80. Adjacent to tue cylinder 87 is an air chest 95 having an inlet port .10 communicating: with a suitable source of supply, as for example a reservoir through the pipe 98. The outlet or exhaust for the air chest 35 is shown at 99 so that air passing into the chest through the port 06 may pass through the port 90 into the cvlinder 87. i

In order to control the delivery of air through the port 90 and thereby control the pressure within the cylinder 87, I have provided a slide valve designated hv the reference numeral 100; this slide valve. 100 is shown as consisting of an elongated hodv portion slidahle upon the floor 101 of the air chest and held against its seat 102 hy means of springs 103 and 10-1 and also hv means of the pressure within the chest. fllhe valve 100 has within it, ports 105` 100. 10T and 10S. The ports 105 and 107 are normally closed or approximately closed hv the piston valve 100 connected to the pis ton 89 by a finger 110. The slide valve 100 is provided with a pocket or recess 1111 which approximately coincides with a similar one 112 here shown as heing formed in the wall of the cylinder Si' and these tivo recesses receive a finger illustrated as a cam 113 on the shaft 11i extending through the wall of the cylinder S7 and moving against the rollers 113% 0n the shaft 114 is a` controller lever 115 carrying a friction dog 116 to trietionaliy engage one of tivo segments 117 and 117% the segment 11i in confirme.- tion with the segment 117 forms av slot in which the lever 115 may move hack and torth while the segment 117'l in connection with the segmental har 117] forms another slot into which the lever 115 may he moved through a selective notch in a manner com mon to selective gear levers. The segment 11T1 or either ot the other two, may he provided with suitable giadations or a scale whereby the lever 115 may he moved to the proper position with respect to the segment to insure proper increments of the speed of the motor carrying the speed responsive device or so that suitahie pressure ma y he maintained in the cylinder 8T. The finger 113 need not necessarily be a cam, but when the control is employed in conjunction With a speed responsive device, I find it desirable to employ a cam of the contour illustrated `because the pressure from the pipe S15 into the cylinder (58 oi the speed responsive device will vary directly as the pressure in the cylinder 87 and the resistance opposed to the weight carried by the piston or spindle 77, and the pressure. under it will be proportional to the square of the speeds of the weights, so the movement of the valve 10() must be proportionately increased for progressive increased increments of speed ot the governor or speed responsive device. In other Words the progressive movements of the handle 115 may give any desired variation in speed of the governor apparatus.

In the apparatus illustrated the segment 11i'h is so graduated that the scale indicates the revolutions per minute of the machine or engine connected to the governor and the operating faces of the cam are constructed accordingly, that is so that equal increments of motion of the handle 115 along the scale will cause equal variations in the speed of the governed apparatus. It will be apparent from this that the cam is employed merely because its operating faces can be easily constructed to produce the required motion ot' the valve 100.

By reference to Fig. 6 it will be observed that in addition t'o the control mechanism for the speed responsive device, I have associated with the said mechanism means tor applying pressure to the pipe 51; this means consists of a valve 118 which presses against its seat 119 by a spring 120 bearing against the floor 121 of the air chest 95. The valve 119 is provided with a` pin 122 which is fast on the shaft 111. lithin the casting forming a part of the cylinder 87 is an ontlet port 123 normally closed by the valve 118 and adjacent to the outlet port 123 is an exhaust port 12-1 which communicates with an opening in the valve seat 119 and exhaust to atmosphere. The shaft 114 engages the cam 11? by a key or sliding connection. the key being illustrated at 125, Fig. The lever 115 is fulcruined at 1213. From the construction just described. it follows then that it the lever is moved in a forward or rearward direction.A the cam 113 will he operated as above enumerated so that a propel' amount ot' pressure will be admitted to the cylinder of the governor and this vvill be true Whether the lever 115 is in the slot formed by the segments 11i' and 117a or Whether it is in the slot formed by the segments 11TH and 11T. As heretotore stated. the lever may readily be moved into either slot through a selective notch ln the segment 117, lf the lever is in the slot toi-med bv the segments 11i' and 117, as for example, in the position shown in Fig. ti, it can be moved in said slot to control the speed responsive device only. If, however, it is moved on the fulcrum 126 so that it will pass through the selective notch into the slotformed by the segment 117a and 11`Tb, the shaft 111 will be moved in the direction of the arrow, Fig. 6, so as to carry the valve 118 past the port 123 and admit pressure from the `air chest through the port 123 and out through the pipe 51, Which communicates with the casing of the reversing valve. In'such a position, the pressure from the controlling device, or more properly speaking from the pressure chest of the controlling device, will actuate the valve stem 15 against the action of the spring 49 and render the oil relay for the ahead stage valve operating mechanism ineffective, but ivill render the oil relay for the astern valve operating mechanism effective.

It may possibly happen that the pressure in the main reservoir would fail or from some cause the pipes leading to the relays might become broken; to avoid difficulty under such conditions, I have provided an emergency valve illustrated for each oil relay illustrated in Fig. 2. Prior to operating the emergency valve both oil relay pilot valves will be in exhaust position because the governor or speed responsive device will be devoid of pressure under its piston and when the pilot valves are so positioned, the emergency valve may be operated. The valve is shown in Fig. 2 as comprising a casing 127 having ports 128, 129 and 130 and a three-Way valve 131 is provided in the easing to admit` pressure from a suitable source in communication with the pipe 12R through the pipe 130 to the port 38 or to exhaust pressure from the port 38 back through the pipe 130 'and out through the exhaust 12S). Then the emergency valve 131 is not being used the communication between the pipe 130 and the port 38, it is closed by a check valve 132. When the pressure is being admitted through the emergency valve the check valve 132 will close communication between the port 38 and the reversing valve or between the port 38 and reversing valve as the case may be. I have shown an emergency valve as being connected to the ahead stage relay, but it is obvious that a separate emergency valve may be provided for the astcrn stage relay, or a single multiported valve may bc employed whereby both relays may be controlled from one controller.

Assuming all the parts are properly assembled and that the necessary pipes to receive pressure are provided with suitable souri-es at supply, and suppose it is desired to start the motor, the operator on the bridge or at any other convenient point distant troni the motor (if distant control is desirable) may grasp the handle 115, and by moviag it in the direction indicated by the arrow in Fig. 5, admit pressure to the c ylinder G8. By so doing the rod or stein 7T will be moved longitudinally to impart movement to the linlr S1 and through the mechanism connected to it cause the valve 59 to uncover the port 55 and admit pressure through the reversing valve into the cylinder so as to impart movement to the piston 234. The longitudinal movement of the piston Iii-1 due to the pressure through the relays will cause a movement of the segment 27 resulting in a rotative movement being imparted to the valve on the shaft Q1, and the movement of pressure admitted to the cylinder G8 will determine the amount of eiiective port area through which steam may pass into the ahead stage ot thc turbine. The turbine will then start and the speed responsive device will be effective in controlling the speed, which will be determined by the position of the handle of the lever 115 with respect to the scale on the segment 117".

It the piston 78 was unrestricted in its movement when air was admitted to the cylinder 68. it might happen thatthe admission valves to the turbine would be actuated too suddenly inasmuch as the slightest amount of air in the cylinder 68 would initially move the piston 78 along the entire length of the cylinder G8 S0 as to open the pilot valves for the oil relays to their fullest extent and these valves would not move back until the speed responsive device started to operate due to the operation of the turbine. ln order to prevent the full opening movement of the pilot valve for the oil relays, 1 have provided a spring 139 connected to the lever 7i? and to the casing of the speed responsive device whereby when pressure is admitted to the cylinder G8, the movement of the piston 78 will be opposed by said spring and a gradual opening movement of the pilot valves for the oil relays and consequently a gradual opening movement of the admission valve for the turbine Will take place.

Ii it is desired to change the speed of the motor, this can be accomplished by moving the lever in either one direction or the other dependent upon 'whether the speed is to be accelerated or reduced. Suppose it is desired to reverse the motor, the operator may grasp the handle of the lever 115 and by relieving pressure from the cylinder G8. the

piston "78 will move longitudinally so as to permit fluid from the cylinder to exhaust and permit the spring 3T to actuate the piston 34 and close the inlet valve to the ahead stage of the turbine. The lever 115 may then be moved over into the slot `formed by the segments 117Ht and 117", which will result in moving the valve 118 so as to open communication with the port 123 and move the piston carrying stem l5 against the spring 49 closing oill communication between the pilot valve for the ahead stage relay and the reversing valve and opening communication between the astern relaypilot 'alve and the reversing valve so that pressure may enter the port 3S and actuatc the piston 3l to open the asteru stage motorwill he reversed.

ln order to convey a comprehensive idea ot' the generic principles of my invention I have specifically described various details of construction which will be effective in carrying it out. but l do not desire to limit myself to the specific form shown, no1' to the minor details ot' construction embodied in the illustration, it being obvious that changes in i'orm. proportion and minor details of coustruction may be resorted to Without departing from the spirit of the invention or sacrificing any of its advantages.

Having thus described my invention. what l claim is:

1. The combination with a motor, an inlet valve for the motor, a speed responsive device. a relay connected to the speed responsive device and valve and means distant from the motor to load said speed responsivel device to determine the amplitude of movement of the inlet valve.

The combination with a` motor.y an inlet valve for said motor. a speed responsive device, au inlet valve connected to said speed responsive device and means distant from the motor to load said speed responsive device against the action .of the governor weights.

3. The combination with a motor, an inlet valve for the motor, a speed responsive device controlling said valve lluid pressure controlling means for loading the speed responsive device, and manually adjustable means for controlling said controlling valve whereby the i. The combination with a motor, an inlet valve for the motor, a relay connected to the valve. a speed responsive device for operating the relay and a hand actuated fluid pressure device for loading the speed responsive device.

5. The combination with a motor, a speed responsive device. a. valve controlled bv the speed responsive device and a hand operated fluid controlling mechanism for loading the speed responsive device. (i. A turbine having an ahead stage and an astern stage.` valves for the inlets ttor the respective stages, a speed responsive device for controlling the openinflr and closing movement of said valves and means distant from the motor for variably holding the governor spindle to counteract the etlect of the centrifugal force of the governor weights.

7. A turbine having an ahead and an astern stage, separate valves for admitting motive luid to the respective stages, a speed Acontrolling the operation of said responsive device for controlling the extent of opening movement of said valves, means for variably holding said speed responsive device and means distant from the motor for determining which of said valves shall have an opening movement imparted to it by the speed responsive device.

8. A turbine having an ahead and an astern stage, separate valves for admitting motive fiuid to the respective stages, a speed responsive device for controlling the extent of opening movement of' said valves, means for variably holding said speed responsive device vand manually controlled means distant from the motor for determining which of said valves shall have an opening movemenl''imparted to it by the speed responsive device.

9. A turbine having an ahead and an astern stage, separate valves for admitting motive fluid to the respective stages, a speed responsive device for controlling the extent of opening movement of said valves, means for variably holding said speed responsive device and Huid pressure controlling means distant from the motor for determining which of said valves shall have an opening movement imparted to it by the speed responsive device.

10. An apparatus of the character described, comprising a motor, means for delivering motive fluid thereto, a relay for controlling the operation of said means, a speed responsive device for controlling the operation of said relay, and regulable pressure actuated means for controlling the operation of said speed responsive device, to vary the speed of the motor.

V11. An apparatus of the character described, comprising a motor, means for delivering actuating fluid thereto, a relay for means, a speed responsive device for controlling the operation of the relay, pressure actuated means for controlling the effective operation of said device, and means located at a distance from the motor for controlling the operation of said pressure actuated means.

12. An apparatus of the character described, comprising a motor, means for delivering actuating fluid thereto, a speed responsive device controlling the operation of said means, pressure actuated means for controlling the operation of said device, and means located at a distance from the motor for varying the actuating pressure' of said means.

13. An apparatus of the character described, comprising a motor, means for delivering actuating fluid to the motor, a governor for controlling the operation of said means, fiuid pressure actuated means-for varying the operation of said governor, and a controller for delivering regulable Huid pressure to said pressure actuated means.

-ulating the 14. An apparatus of the character described, comprising a Huid actuated mechanism, means for delivering actuating fluid to said mechanism, a speed responsive governor for controlling the operation of said means, pressure actuated means for varying the effective operation of the governor inY response to defined speeds, and acontroller for delivering regulable pressures to said pressure actuated means.

15. In combination, a fluid impelled motor having separate Huid delivery valves, separate actuating means for said valves, a governor for controlling the operation of said separate actuating means, a controller 1ocated at a distance from the motor for varying. the efi'ectiveoperation of the governor, and means for rendering one or another of said valve actuating means inoperative.

1.6. An apparatus of the character described, comprising a Huid delivery means and an actuating mechanism therefor, a governor for controlling the operation of said mechanism, Huid pressure actuated means for controlling the effective operation of said governor and a remote controller for regulating the actuating pressure of said governor controlling means and for rendering said actuating mechanism operative or inoperative.

17. An apparatus ofl the character described, comprising a Huid delivery means, an actuating mechanism therefor, a governor for controlling the operation of said mechanism, fluid pressure actuated means for controlling the effective operation of said governor, a remote controller for regactuating pressure of said governor `controlling means, and means for rendering said actuating mechanism operative or inoperative.

18. An apparatus of the character described, comprising a fluid delivery means and an actuating mechanism therefor, a governor for controlling the operation of said mechanism, fiuid pressure actuated means for controlling the effective operation of said governor, and a remote controller for regulating the actuating pressure to said governor controlling means.

19. A device of the character described, comprising fluid delivery valve means, a pressure actuated motor for controlling the operation of said valve means,` a relay valve for controlling the delivery of actuating pressure to said motor, a governor for controlling the operation of the relay valve, and means for connecting the relay valve to the motor `controlled thereby, whereby the relay valve moves with the motor.

20. In a device of the character described, a fluid delivery valve, a pressure actuated motor for controlling the operation of said valve, a relay valve for controlling the delivery of actuating fluid to said motor, a

governor for controlling the operation of the relay valve, a connection between the relay valve and the motor for varying the position of the relay valve during the operation of the motor, means located between the relay valve and the motor for rendering the valve effective or ineffective in delivering actuating fluid to the motor, and a remote controller for actuating said last mentioned means.

21. In an apparatus of the scribed, a fluid delivery valve, an actuating motor therefor, a relay device for controlling the operation of said motor, a governor for controlling the operation of the relay device, and a remote control for the governor.

22. In a fluid impelled engine, the cembination of a fluid delivery valve for proportioning the delivery of motive fluid to the engine, a motor for actuating said valve comprising a pressure actuated piston, a cylinder in which the piston is located, a relay for controlling the fluid pressure within the cylinder, a positive connection between the relay and the piston whereby the motion of the piston actuates the relay and thereby determines the extent of motion of the piston, and a valve located between the relay and the piston for rendering the relay effective or ineffective as the pressure controlling agent.

23. In a fluid impelled engine, the combination of a fluid delivery valve for proportioning the delivery of motive fluid to the engine, pressure responsive means for actuating said valve, a governor controlled relay for controlling the actuating pressure delivered to said means, and a valve between the relay and said means for rendering the relay effective or ineffective as the ressure controlling agent of said means.

Q4. In a fluid impelled engine, the coinbination of a fluid delivery valve for delivering and for proportioning the delivery of motive fluid to the engine, pressure responsive means for actuating said valve, a governor controlled relav for delivering actuating fluid to and for ischarging it from said means, a valve between the relay and said means for rendering the relay effective or ineffective in controlling the operation of said means, and an emergency valve for delivering actuating fluid to and for controlling the operation of said means.

25. In a fluid impelled engine, the combination of fluid delivery means for proportioning the delivery of fluid to the engine, a cylinder and a coperating pressure actuating plunger for actuating said means, a relay for controlling the pressure delivered to the cylinder, a selective mechanism interposed between the relay and the cylinder for rendering the relay effective or ineffective in controlling the character deoperation of the piston, and an emergency valve communicating with said selective mechanism for controlling the operation of the piston when said relay is incapacitated.

26. In a fluid impelled engine, the combination of fluid delivery means for delivering and proportioning the delivery of fluid to the engine` a cylinder and a coperating pressure actuated plunger for actuating said means, a relay for controlling the delivery of actuating fluid to and the discharge of actuating fluid from the cylinder, a selective mechanism interposed between the relay and the cylinder for rendering the relay effective or ineffective in controlling the operation of the piston, an emergency valve communicating with said selective mechanism and for controlling the delivery of actuating fluid to the cylinder which the relay is incapacitated, and a check valve between said emergency valve and said selective mechanism.

27. In a fluid impelled engine, the combi` nation of a rotatable valve for proportioning the delivery of fluid to said engine, a pressure cylinder, a pressure responsive piston located in the cylinder for actuating the valve, means fer proportioning the pressure delivered to the piston, a rack actuated by the piston, a gear for rotating the valve, and means actuated by the rack for actuating the gear.

2S. In a fluid impelled engine, the combination of a rotatable valve for delivering and for proportioning the delivery of fluid to said engine, a pressure cylinder, a pressure responsive piston located Within the cylinder, a relay for proportioning the actuating pressure delivered to the cylinder, a governor for actuating the relay, a connec- `tion between the piston and the relay whereby the relay moves in response to the m0- tion of the piston, a rack actuated by the piston, a gear for controlling the rotatable valve, and means actuated by the rack for actuating the piston.

29. In combination, two separate fluid delivery valves, a separate pressure actuated device for actuating each valve, a separate governor controlled relay for controlling the operation of each device, and a manually controlled selective mechanism located between said device and said relay for rendering one relay effective and the other ineffective in controlling the operation of its correspondin device.

30. In comination, two separate fluid delivery valves, a separate pressure actuated device for actuating each valve, a relay valve for controlling the operation of each device, a governor, means for connecting both relay valves to said governor, and a selective mechanism between said relay valves and their respective devices for rendering one effective and the other ineffective in controlling the operation of its respective device.

31. In combination with a speed responsive governor, a controller comprising a cas*- ing lnclosing a variable pressure chamber, and-a uniform pressure chamber, and having an exhaust port and a pressure delivery port, coperating pressure responsive and manually controlled means for controlling the delivery of pressure from the uniform pressure chamber to the variable pressure chamber, a valve for establishing communication between said Huid delivery port and said fluid exhaust port, or between said fiuid delivery port and said uniform pressure chamber, a single operating lever for controlling said valve and said manually controlled means, and means responsive to the pressure delivered through said pressure delivery portfor controlling the operation of the governor.

32. In combination with a speed responsive governor, a controller having regulable means for delivering a variable pressure to a pressure chamber forming a part of the controller, a manually controlled valve for establishing and cuttin ofi communication between a pressure elivery port of the controller, and a chamber of substantially constant fluid pressure, a single lever for actuating said valve and said regulating means, and means communicating with said pressure delivery port for controlling the operation of the governor.

33. A fluid actuated motor having fluid delivery means, in combination with mechanisms for actuating said means, a speed responsive device driven by the motor for controlling the operation of said means, pressure actuated means for rendering one or the other of said first mentioned means operative in controlling the delivery of lcating with said means, and an inlet port,

a pressure chest, communicating With asource of substantially constant pressure and with said inlet port and with an eX- haust port, a valve responsive to variations of pressure within said pressure chamber for controlling communication between said inlet port, said chest and said exhaust port, and manually adjustable means for varying the effective operation of said valve.

35. In combination, a speed controlling governor, pressure actuated means for varying the operation of said governor and a pressure controller comprising a chamber provided with an outlet port communicating with said pressure actuated means, and an inlet port, an adjusting means provided with an opening communicating with said inlet port, a valve responsive to variations of pressure within said chamber for controlling the delivery of fluid through said opening, and means for moving said adjusting means relative to said valve to vary the pressure Within said chamber.

lIn testimony whereof, I have hereunto subscribed my name this 22nd day of November, 1910.

` HERBERT T. HERR. Witnesses:

C. W. MCGHEE, B. F. FUNK.

ing an exhaust port and a pressure delivery,

y' l in controlling the operation of its. respective device. 31. In combination with a' speed responsive governor, a controller comprising a casing 1nclosing a variable pressure chalnber, and-a uniform pressure chamber, and havport, coperating pressure responsive and manually controlledmeans for controlling the delivery `of pressure from the uniform pressure chamber to the variable pressure chamber, a valve for establishing communication between said fluid delivery port and said fluidexhaust port, or between said fluid delivery port and said uniform pressure chamber, a single operating lever for controlling" said valve and said manually controlled means, and means responsive to the pressure delivered through said pressure delivery portl for controlling the operation of the governor.

32. In combination with a speed responsive governor, acontroller having regulable means for delivering a' variable pressure to a pressure chamber forming a part of the controller, a manually controlled valve for establishing and cuttin olf communication between a pressure elivery port of the controller, and a chamber of substantially constant fluid pressure, Ma single lever for actuating said valve and said regulating Corrections inlgLetters Patent No. 1,185,096

means, and means communicating with said pressure delivery port for controlling the operation of the governor.

33. A fluid actuated motor having fluid delivery means, in' combination with mechanisms for actuating said means, a speed responsive device :lriven by the motor for controlling the. operation of said means, pressure actuated means for rendering one or the other of said first mentioned means operative in controlling the delivery of [slaan] 34. In combination with a speed responsive y.'

governor, pressure actuated means for varying the effective operation of the governor, and a controller for varying the pressure delivered to said means, comprising a pressure chamber having a delivery port communi- 'eating with said means, and an inlet port,

ar pressure chest, communicating with a source of substantially constant pressure and with said inlet port and with an eX- haust port, a valve responsive to variations of pressure within said pressure chamber for controlling communication between said inlet port, saidchest and said exhaust port, and manually adjustable means for varying the effective operation of said valve.

35. In combination, a speed controlling governor, pressure actuated means for varying the operation of said governor and a pressure controller comprising a chamber provided with an outlet port communicating with said, pressure actuated means, and an inlet port, an adjusting means provided with an opening communicating with said inlet port, a valve responsive to variations HERBERT T. HERR. lVitnesses C. W. MCGHEE, B. F. FUNK.'

It is hereby certified that in Letters Patent No. 1,185,096, granted May 30, 1916, l upon the, applicatidn of Herbert Herr, of Pittsburgh, Pennsylvania, for an improvement in" -Motor Control, errors appear-in the printed specification requiring I correction as follows: Page 8., line 6 0-, claim`25, for the word actuating, first occurrence, read actuated; same page, line 84, claim 26, for the Word Vwhich read when; and that the said Letters Patent should be, read with these corrections4 therein that the same may conform to the record of the case in the PatentOice.,

Signed and sealed this 22d day of August, A. D.,1916,.

y F. W. H. CLAY, Acting Commissioner of Patents.

It is hereby certified that in Letters Patent No. 1,185,096, granted Mey 30, 1916, upon the applicatidn of Herbert Tl Herr, of Pittsburgh, Pennsylvania, for an improvement in Motor Control, errors appear in the printed specification requiring correction as follows: Page 8, line 60., claim 25, for the word actuating, first occurrence, reed acmaed; same page, line 84, claim 26, for the Word which" read when; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oice.

Signed and sealed this 22d day of August, A. D., 1916.

F. W. H. CLAY,

Acting Commissioner of Patents.

[eEALJ 

